@use 'sass:map';
@use 'sass:meta';
@use '../core/tokens/m2-utils';
@use '../core/tokens/m3-utils';
@use '../core/theming/theming';
@use '../core/theming/inspection';
@use '../core/style/elevation';

@function get-tokens($theme) {
  $system: m2-utils.get-system($theme);
  // TODO: Use system colors instead of checking theme type
  $is-dark: false;
  @if (meta.type-of($theme) == map and map.get($theme, color)) {
    $is-dark: inspection.get-theme-type($theme) == dark;
  }
  $disabled: m3-utils.color-with-opacity(map.get($system, on-surface), 38%);
  $disabled-container : m3-utils.color-with-opacity(map.get($system, on-surface), 12%);
  $density-scale: theming.clamp-density(map.get($system, density-scale), -3);
  $touch-target-size: 48px;
  $touch-target-display: block;

  @if ($density-scale < -1) {
    $touch-target-display: none;
  }

  @return (
    base: (
      fab-container-elevation-shadow: elevation.get-box-shadow(6),
      fab-container-shape: 50%,
      fab-touch-target-size: $touch-target-size,
      fab-extended-container-elevation-shadow: elevation.get-box-shadow(6),
      fab-extended-container-height: 48px,
      fab-extended-container-shape: 24px,
      fab-extended-focus-container-elevation-shadow: elevation.get-box-shadow(8),
      fab-extended-hover-container-elevation-shadow: elevation.get-box-shadow(8),
      fab-extended-pressed-container-elevation-shadow: elevation.get-box-shadow(12),
      fab-focus-container-elevation-shadow: elevation.get-box-shadow(8),
      fab-hover-container-elevation-shadow: elevation.get-box-shadow(8),
      fab-pressed-container-elevation-shadow: elevation.get-box-shadow(12),
      fab-small-container-elevation-shadow: elevation.get-box-shadow(6),
      fab-small-container-shape: 50%,
      fab-small-touch-target-size: $touch-target-size,
      fab-small-focus-container-elevation-shadow: elevation.get-box-shadow(8),
      fab-small-hover-container-elevation-shadow: elevation.get-box-shadow(8),
      fab-small-pressed-container-elevation-shadow: elevation.get-box-shadow(12),
    ),
    color: (
      fab-container-color: map.get($system, surface),
      fab-disabled-state-container-color: $disabled-container,
      fab-disabled-state-foreground-color: $disabled,
      fab-disabled-state-layer-color: map.get($system, on-surface-variant),
      fab-focus-state-layer-opacity: map.get($system, focus-state-layer-opacity),
      fab-foreground-color: map.get($system, on-surface),
      fab-hover-state-layer-opacity: map.get($system, hover-state-layer-opacity),
      fab-pressed-state-layer-opacity: map.get($system, pressed-state-layer-opacity),
      fab-ripple-color: m3-utils.color-with-opacity(
          map.get($system, on-surface), map.get($system, pressed-state-layer-opacity)),
      fab-small-container-color: map.get($system, surface),
      fab-small-disabled-state-container-color: $disabled-container,
      fab-small-disabled-state-foreground-color: $disabled,
      fab-small-disabled-state-layer-color: map.get($system, on-surface-variant),
      fab-small-focus-state-layer-opacity: map.get($system, focus-state-layer-opacity),
      fab-small-foreground-color: map.get($system, on-surface),
      fab-small-hover-state-layer-opacity: map.get($system, hover-state-layer-opacity),
      fab-small-pressed-state-layer-opacity: map.get($system, pressed-state-layer-opacity),
      fab-small-ripple-color: m3-utils.color-with-opacity(
          map.get($system, on-surface), map.get($system, pressed-state-layer-opacity)),
      fab-small-state-layer-color: map.get($system, on-surface),
      fab-state-layer-color: map.get($system, on-surface),
    ),
    typography: (
      fab-extended-label-text-font: map.get($system, label-small-font),
      fab-extended-label-text-size: map.get($system, label-small-size),
      fab-extended-label-text-tracking: map.get($system, label-small-tracking),
      fab-extended-label-text-weight: map.get($system, label-small-weight)
    ),
    density: (
      fab-small-touch-target-display: $touch-target-display,
      fab-touch-target-display: $touch-target-display,
    ),
  );
}

// Generates the mapping for the properties that change based on the FAB palette color.
@function private-get-color-palette-color-tokens($theme, $color-variant) {
  $system: m2-utils.get-system($theme);
  $system: m3-utils.replace-colors-with-variant($system, primary, $color-variant);

  @return (
    fab-container-color: map.get($system, primary),
    fab-foreground-color: map.get($system, on-primary),
    fab-ripple-color: m3-utils.color-with-opacity(
        map.get($system, primary), map.get($system, pressed-state-layer-opacity)),
    fab-small-container-color: map.get($system, primary),
    fab-small-foreground-color: map.get($system, on-primary),
    fab-small-ripple-color: m3-utils.color-with-opacity(
        map.get($system, on-primary), map.get($system, pressed-state-layer-opacity)),
    fab-small-state-layer-color: map.get($system, on-primary),
    fab-state-layer-color: map.get($system, on-primary),
  );
}